Always a pleasure to work with Jon who installed the boiler and maintains it - he's even good natured when I call him with some ridiculous question and he still visits to reassure me :-)
While we don't verify specific claims because reviewers' opinions are their own, we may label reviews as "Verified" when we can confirm a business interaction took place. Read more
To protect platform integrity, every review on our platform—verified or not—is screened by our 24/7 automated software. This technology is designed to identify and remove content that breaches our guidelines, including reviews that are not based on a genuine experience. We recognise we may not catch everything, and you can flag anything you think we may have missed. Read more
See what reviewers are saying
Called Jon out as our old boiler wasn’t working. He got it going but recommended that it needed replacing but also provided a quote for a permanent fix to the old boiler. We opted for replacement wh... See more
Fantastic service at a reasonable rate and in a swift timeline. Jon sourced the cylinder and fitted in a few days - despite issues with the supplier! informed the tenants constantly and kept them loop... See more
Jon was efficient doing a highly professional Job. He was clear with his communication about what he was doing and what he discovered in his investigation. He was friendly whilst keping his workspac... See more
Company details
Written by the company
Theale Gas is a small family run business covering Berkshire, Hampshire and surrounding areas. We specialise in gas, heating and plumbing solutions and are proud to be Worcester accredited installers. Theale Gas is owned and run by Jon Fleming who also lives in Theale near Reading. Jon has nearly 30 years of experience in the industry and is joined by a team of 3 engineers with a wide range of expertise and specialisms. Theale Gas pride ourselves on great customer service, timeliness, tidiness and reliability. If you have a heating or plumbing problem please don’t hesitate to call Theale Gas for a friendly no obligation conversation/quote to see how we can help.
Contact info
28 Woodfield way, RG75AB, Theale, United Kingdom
- 07979542998
- Jon@thealegas.co.uk
- thealegas.co.uk
No recent history of asking for reviews
This company hasn't invited customers recently, so reviews may not be representative
How this company uses Trustpilot
See how their reviews and ratings are sourced, scored, and moderated.
Very reliable
Very reliable , on time, competent and trustworthy.thank you so much for the work done
Very professional
Very professional, work to a high standard, polite and kept everything tidy. Many thanks
Jon and Matt.
Very happy.
Great customer service
Having struggled to find a responsive Gas Safe qualified installed for a while, it has been a pleasure dealing with Jon from Theale Gas. Rather than waste our money servicing a clearly compromised boiler and other system components, he gave us options to repair or replace and having opted for a repair we now have a fully working system at a reasonable cost. I'd have no hesitation recommending Theale Gas.
A New Boiler - A Professional, Worry Free experience.
Following an inspection of my heating system Jon, (Theale Gas) recommended the replacement of my old (22 years) Central Heating Boiler to a New, Modern, Efficient Worcester Greenstar 15Ri.
They provided a more than competitive quote to supply & fit and disposal of my old boiler and a date for the work to take place.
On the agreed day, Jon & Ben arrived on time, carried out their work Professionally & efficiently and installed the New Boiler as agreed. I was able to continue my own work during this time and any noise disturbance was kept to a minimum. They ensured that I understood the work they were undertaking and sought my agreement before hand.
I have used Theale Gas on a number of occasions to Service and Maintain my previous boiler and heating system in the past and can totally recommend the services they provide. I now have a New Boiler and I'm confident that it will keep me warm and that Theale Gas will continue to provide ongoing support as maybe required.
I am please to Recommend Theale Gas as a Trusted Trader and commend them to you.
Excellent and prompt service
Excellent and prompt service. A pleasure to do business with and will use again.
Highly recommend Jon and his team
Jon and his team have carried out various work - including fitting a new boiler, installing a new heated towel rail and new radiator. We have been very impressed with the work.
Jon kept us informed re dates. The whole team were clean and tidy and took all old equipment away.
Highly recommend!
Fantastic service
Fantastic service. Had a heating system problem and they managed to fit me in within a day when others said it would be weeks. Did a great job, quickly and it was great value too. Now my preferred local supplier.
boiler service
Quick boiler service, Jon was friendly and professional. Will use again.
Great service
Jon provide a great service and kept us informed about any delays to his arrival time.
First class👍

Reply from Theale Gas
Excellent service
Jon was excellent. Theale Gas came to us by a recommendation, and we would definitely recommend them ourselves. Jon was punctual, thorough and explained everything we needed to know in everyday terms. An excellent service from start to finish.

Reply from Theale Gas
Excellent service
Excellent service, fitted new pipes for central heating system.
Excellent Service
Helpful, knowledgeable and very responsive with realistic pricing. Exactly what you need!
Great work by Theale Gas
Jon comes when he says he will, honours his quotes, and explains what he is going to do beforehand. His work is first class and professional and nothing is too much trouble.
Very happy with the boiler installation he did for us.
Reading’s best boiler engineer
We used Theale Gas to move a water tank up into a loft in a confined space Jonathan did a great job worked really hard and was a pleasure to have in my home ,the price was very reasonable and he did an excellent job and I would thoroughly recommend him
Excellent service from Jon (and Ben)!
Excellent service from Jon (and Ben)!
I found Theale Gas through the Worcester Bosch website as I wanted to take advantage of the extended warranty offered using the preferred suppliers, whilst supporting local business, and I'm so glad I did.
After making an initial enquiry through the website Jon was in touch super quick and even managed to pop round the same day to quote for me as I was going away the next day.
My new boiler is excellent and the work was carried out to an extremely high standard - by the time they'd finished you'd never have known they'd been there at all if it wasn't for the new heating system that works properly and the extra space where the old tanks used to be 😊
Polite, professional and a pleasure to have around, Theale Gas go above and beyond to provide a 5* service.

Reply from Theale Gas
I can't recommend Theale Gas highly…
I can't recommend Theale Gas highly enough. Jon and his team installed a new boiler in my tenanted property and issued me the Landlord Safe Certificate. Now I wont allow anybody else to serve it but only Jon, even though I have a Landlord insurance with BG which includes the Landlord Gas Safety report I prefer to pay as an extra for my peace of mind, knowing my boiler is in the best hands. Efficient, reliable and trustworthy that are the characteristics I valued the most in a trader.
Replaced gas boiler and system pump
Replaced gas boiler and system pump. Excellent service from Jon. Job done exactly as promised for both time and cost. Highly recommended
Combi Boiler Installation
Had a beautiful Combi boiler installed by Jon and Ben. Really impressed by their work, no sooner were they here and the job was finished. Really happy with the boiler. It looks smart, has fast hot water and the radiators have never felt so hot ! Many thanks to you both for a great job well done.
Responsive and delivered to promise.
The Trustpilot Experience
Anyone can write a Trustpilot review. People who write reviews have ownership to edit or delete them at any time, and they’ll be displayed as long as an account is active.
We use dedicated people and clever technology to safeguard our platform. Find out how we combat fake reviews.
Learn about Trustpilot’s review process.
Here are 8 tips for writing great reviews.
Verification can help ensure real people are writing the reviews you read on Trustpilot.
Offering incentives for reviews or asking for them selectively can bias the TrustScore, which goes against our guidelines.







